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Ancient Martian deltas reveal timing of early ocean retreat
Original: Delta morphology reveals timings of early ocean regression and hydrologic shift on ancient Mars
New research published in Nature uses the shape and structure of ancient deltas on Mars to pin down when the planet's early ocean receded and when hydrologic conditions shifted. By analyzing delta morphology, researchers established timings for the regression of the putative northern ocean and the subsequent decline of surface water activity, refining the timeline of Mars' transition from a wetter world to the arid planet seen today.
Why now: The study offers new evidence about when Mars lost its early ocean, a long-standing question in planetary science.
Evidence
- Delta morphology reveals timings of early ocean regression and hydrologic shift on ancient Mars · Nature
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